Reachable assertion in libheif - CVE-2026-62377

Vulnerability identifier: #VU135831

CSH Severity: Low

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-62377

CWE-ID: CWE-617

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to reachable assertion in HeifContext::get_track() when processing a crafted HEIF sequence file that is accepted with no registered sequence tracks. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.

User interaction is required to open or process the crafted HEIF file. In builds with assertions disabled, the issue may instead lead to undefined behavior due to dereferencing an empty track map.

libheif
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Fedora
Desktop Applications Module
SUSE Package Hub 15
Ubuntu
libheif-dev (Ubuntu package)
heif-thumbnailer (Ubuntu package)
libheif-plugin-aomdec (Ubuntu package)
libheif-plugin-aomenc (Ubuntu package)
libheif-plugin-dav1d (Ubuntu package)
heif-view (Ubuntu package)
libheif-plugin-ffmpegdec (Ubuntu package)
libheif-plugin-j2kdec (Ubuntu package)
libheif-plugin-j2kenc (Ubuntu package)
libheif-plugin-jpegdec (Ubuntu package)
libheif-plugin-jpegenc (Ubuntu package)
libheif-plugin-kvazaar (Ubuntu package)
heif-gdk-pixbuf (Ubuntu package)
libheif1 (Ubuntu package)
libheif-plugin-rav1e (Ubuntu package)
libheif-plugin-svtenc (Ubuntu package)
libheif-plugins-all (Ubuntu package)
libheif-plugin-libde265 (Ubuntu package)
libheif-plugin-x265 (Ubuntu package)
xeve
xevd
openjph
libheif-ffmpeg-debuginfo
libheif-debugsource
libheif-ffmpeg
gdk-pixbuf-loader-libheif
libheif-devel
gdk-pixbuf-loader-libheif-debuginfo
libheif-dav1d-debuginfo
libheif1
libheif-aom
libheif-jpeg
libheif-jpeg-debuginfo
libheif-aom-debuginfo
libheif-rav1e
libheif-dav1d
libheif-rav1e-debuginfo
libheif1-debuginfo
libheif
OpenImageIO
mingw-openexr
aom
ffmpeg

Install security update from vendor's website.

libheif - update to 1.23.1
libheif-dev (Ubuntu package) - update to 1.21.2-3ubuntu0.5
heif-thumbnailer (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-aomdec (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-aomenc (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-dav1d (Ubuntu package) - update to 1.21.2-3ubuntu0.5
heif-view (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-ffmpegdec (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-j2kdec (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-j2kenc (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-jpegdec (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-jpegenc (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-kvazaar (Ubuntu package) - update to 1.21.2-3ubuntu0.5
heif-gdk-pixbuf (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif1 (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-rav1e (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-svtenc (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugins-all (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-libde265 (Ubuntu package) - update to 1.21.2-3ubuntu0.5
libheif-plugin-x265 (Ubuntu package) - update to 1.21.2-3ubuntu0.5
xeve - update to 0.7.1-1.fc46
xevd - update to 0.8.0-1.fc46
openjph - update to 0.32.0-1.fc46
libheif-ffmpeg-debuginfo - update to 1.23.1-150700.3.18.1
libheif-debugsource - update to 1.23.1-150700.3.18.1
libheif-ffmpeg - update to 1.23.1-150700.3.18.1
gdk-pixbuf-loader-libheif - update to 1.23.1-150700.3.18.1
libheif-devel - update to 1.23.1-150700.3.18.1
gdk-pixbuf-loader-libheif-debuginfo - update to 1.23.1-150700.3.18.1
libheif-dav1d-debuginfo - update to 1.23.1-150700.3.18.1
libheif1 - update to 1.23.1-150700.3.18.1
libheif-aom - update to 1.23.1-150700.3.18.1
libheif-jpeg - update to 1.23.1-150700.3.18.1
libheif-jpeg-debuginfo - update to 1.23.1-150700.3.18.1
libheif-aom-debuginfo - update to 1.23.1-150700.3.18.1
libheif-rav1e - update to 1.23.1-150700.3.18.1
libheif-dav1d - update to 1.23.1-150700.3.18.1
libheif-rav1e-debuginfo - update to 1.23.1-150700.3.18.1
libheif1-debuginfo - update to 1.23.1-150700.3.18.1
libheif - addressed in versions 1.23.5-3.el10_3, 1.23.5-3.el10_4, 1.23.6-3.fc46
OpenImageIO - update to 3.2.1.1-2.fc46
mingw-openexr - update to 3.4.15-2.fc46
aom - addressed in versions 3.13.3-1.el10_3, 3.13.3-1.el10_4
ffmpeg - update to 9.0.2-2.fc46

• https://github.com/strukturag/libheif/security/advisories/GHSA-9ww4-9v47-m7pj
• https://github.com/strukturag/libheif/issues/1844

• Multiple vulnerabilities in libheif
• SUSE update for libheif
• Fedora EPEL 10.4 update for aom, libheif
• Fedora EPEL 10.3 update for aom, libheif
• Ubuntu update for libheif
• Fedora 46 update for OpenImageIO, ffmpeg, libheif, mingw-openexr, openjph, xevd, xeve